Monthly data of Tropical Atlantic pacemaker and control runs
    HIST/
        historical run, 30 members, data here is 1980-2020
    PACE_Ano/
        5 members, nudge tropical Atlantic 10S-10N, tappering to 20S and 20N
        nudge tropical Atlantic 10S-10N, tappering to 20S and 20N
        nudge 2 layers to AMIP tos (monthly mean SST) anomaly field. 1 day restoring time
        climateology reference period: 1980-2010
        run period: 19800101-20201231
    PACE_FF/
        same but nudge with full field
    HIND_CTRL/
        10 members of 12 months forecast without pacemaker.
        run period: most of them are 12 months, some (Oct start) are 10 years
        Initial from data assimilation run, not provided here.
    HIND_A/
        30 member of seasonal hindcast. Initial from anomaly data assimilation run
        Start at 15th of Jan, Apr, Jul and Oct. 1982-2020
        nudge tropical Atlantic 10S-10N, tappering to 20S and 20N
        nudge 2 layers to AMIP tos (monthly mean SST) anomaly field. 1 day restoring time
        forecast period: 17 months
        Initial from data assimilation run, not provided here.

    example_plots.py
        Example to plot contour and line chart with python xarray and matplotlib.

Resolution:
    144x96 lon/lat (ocean data is regridded)
    monthly data

Variables (level in hPa):
    OMEGA: 850, 500        (vertical wind)
    U, V:  850, 200        (wind)
    Z:     500, 200        (geopotential height)
    T: 2m, 850, 500, 200   (air temperature)
    Q: 2m                  (specific humidity)
    PRECT                  (precipitation)
    SHFLX                  (surface sensible heat flux)
    LHFLX                  (surface latent heat flux)
    templvl: 0-200m, 10 levels (Ocean potential temperature)

IMPORTANT:
    The time coordinate is the time model output, should be shift -15 days.